Feature:1. AUTOMATIC CALIBRATION: With the convenient automatic calibration button, this water pH tester can easily and accurately recognize the calibration solution for water testing.2. HIGH SENSITIVITY GLASS PROBE: It allows for quick and easy readings of pH levels ranging from 0 to 14.0. The tester ensures accurate measurements within a range of 0.01 pH, providing confidence in your results.3. ONE KEY LOCK FUNCTION: Its design helps to freeze and lock the pH readings, even when the tester is removed from the sample. This feature is especially useful for recording or analyzing data.4. PORTABLE AND CONVENIENT: It boasts a lightweight and portable size, allowing you to carry it effortlessly in your pocket and take measurements anywhere.5. WIDE APPLICATION: It can be used to test the pH balance of drinking water, swimming pools, bathtubs, spa centers, wine, beer, and any other liquid where pH values and PPM data are crucial.Specification:Item Type: Water PH Tester KitMaterial: ABSBattery: 3 x LR44 (Not Included)PH Measurement Range: 0.00-14.00pH, Accuracy: 0.01pHHumidity Measurement Range: 1-99%RH, Accuracy: 1%RHTemperature Measurement Range: 0.1~60, Accuracy: 0.1.Package List:1 xPH Water Tester Pen1 x Manual4 x Buffer Solution Powder1 x Storage Box